package io.renren.utils;

import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 异常处理器
 * 
 * @author chenshun
 * @email sunlightcs@gmail.com
 * @date 2016年10月27日 下午10:16:19
 */
@Component
public class RRExceptionHandler implements HandlerExceptionResolver {
	private Logger logger = LoggerFactory.getLogger(getClass());

	public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
		R r = new R();
		try {
			response.setContentType("application/json;charset=utf-8");
			response.setCharacterEncoding("utf-8");

			if (ex instanceof RRException) {
				r.put("code", ((RRException) ex).getCode());
				r.put("msg", ((RRException) ex).getMessage());
			}else if(ex instanceof DuplicateKeyException){
				r = R.error("数据库中已存在该记录");
			}else{
				r = R.error();
			}

			//记录异常日志
			logger.error(ex.getMessage(), ex);

			String json = JSON.toJSONString(r);
			response.getWriter().print(json);
		} catch (Exception e) {
			logger.error("RRExceptionHandler 异常处理失败", e);
		}
		return new ModelAndView();
	}

//	@Override
//	public ModelAndView resolveException(HttpServletRequest request,
//			HttpServletResponse response, Object handler, Exception ex) {
//		R r = new R();
//		try {
//			response.setContentType("application/json;charset=utf-8");
//			response.setCharacterEncoding("utf-8");
//
//			if (ex instanceof RRException) {
//				r.put("code", ((RRException) ex).getCode());
//				r.put("msg", ((RRException) ex).getMessage());
//			}else if(ex instanceof DuplicateKeyException){
//				r = R.error("数据库中已存在该记录");
//			}else{
//				r = R.error();
//			}
//
//			//记录异常日志
//			logger.error(ex.getMessage(), ex);
//
//			String json = JSON.toJSONString(r);
//			response.getWriter().print(json);
//		} catch (Exception e) {
//			logger.error("RRExceptionHandler 异常处理失败", e);
//		}
//		return new ModelAndView();
//	}
}
